There seems to be no differences in corvette design compared to CGI images i have seen which were released 2 or 3 yrs ago and also a plastic model of it found in janes 2003.
The naval artillery is A-190, anyway the vessel is build in a way that it can be fitted with 8 klub (in place of kashtan-m) and 2 vls 32 cell? tor SAM systems amid ship later on if russia wanted to. Its fitted with EW/ECM system similar to the one in talwar hidden behind the mast for those who are wondering.